diff options
| author | yum <yum.food.vr@gmail.com> | 2025-03-06 14:49:47 -0800 |
|---|---|---|
| committer | yum <yum.food.vr@gmail.com> | 2025-03-06 14:49:47 -0800 |
| commit | 6482b8edd3ecdbf136692e910258dc452f8be71b (patch) | |
| tree | 69d29e992004263bf699983d4828fde6025eb419 /decals.cginc | |
| parent | dfa489b6e6090388186b1d32fb126a11b42d31c5 (diff) | |
Add basic decal system
Diffstat (limited to 'decals.cginc')
| -rw-r--r-- | decals.cginc | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/decals.cginc b/decals.cginc new file mode 100644 index 0000000..c356d45 --- /dev/null +++ b/decals.cginc @@ -0,0 +1,35 @@ +#ifndef __DECALS
+#define __DECALS
+
+#include "features.cginc"
+#include "globals.cginc"
+#include "math.cginc"
+
+void applyDecals(in v2f i, inout float4 albedo, inout float3 normal_tangent, inout float metallic, inout float smoothness) {
+#if defined(_DECAL0)
+ float2x2 decal0_rot = float2x2(
+ cos(_Decal0_Angle * TAU), -sin(_Decal0_Angle * TAU),
+ sin(_Decal0_Angle * TAU), cos(_Decal0_Angle * TAU)
+ );
+ float2 decal0_uv = mul(decal0_rot, i.uv01.xy);
+ decal0_uv = (decal0_uv * _Decal0_MainTex_ST.xy + _Decal0_MainTex_ST.zw) * _Decal0_Tiling_Mode;
+ decal0_uv = (_Decal0_Tiling_Mode == DECAL_TILING_MODE_CLAMP ? saturate(decal0_uv) : decal0_uv);
+
+ float4 decal0_albedo = _Decal0_MainTex.Sample(linear_repeat_s, decal0_uv) * _Decal0_Color;
+ decal0_albedo.a *= _Decal0_Opacity;
+ albedo = alphaBlend(albedo, decal0_albedo);
+
+#if defined(_DECAL0_NORMAL)
+ float3 decal0_normal = UnpackScaleNormal(
+ _Decal0_Normal.Sample(linear_repeat_s, decal0_uv), _Decal0_Normal_Scale * _Decal0_Opacity);
+ normal_tangent = blendNormalsHill12(normal_tangent, decal0_normal);
+#endif
+#if defined(_DECAL0_REFLECTIONS)
+ float4 metallic_gloss = _Decal0_MetallicGlossMap.Sample(linear_repeat_s, decal0_uv);
+ metallic = lerp(metallic, metallic_gloss.r * _Decal0_Metallic, decal0_albedo.a);
+ smoothness = lerp(smoothness, metallic_gloss.a * _Decal0_Smoothness, decal0_albedo.a);
+#endif
+#endif
+}
+
+#endif // __DECALS
|